#include "Mystdio.h"
#include <unistd.h>

#define myfile "test.txt"

int main()
{
    _FILE* fp = _fopen(myfile, "a");
    if (fp == NULL) return 1;
    
    const char* msg = "hello world\n";
    int cnt = 10;
    while (cnt--)
    {
        _fwrite(fp, msg, strlen(msg));
        // fflush(fp);

        sleep(1);
    }

    _fclose(fp);
    return 0;
}
